# Vextorium Crypto Funding Rates

> Vextorium Crypto Funding Rates is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-28).

Retrieves current perpetual futures funding rates across multiple exchanges (dYdX, Hyperliquid, Aevo, etc.) for a given cryptocurrency, including annualized rates, open interest, and cross-exchange spread strategy suggestions.

## Facts

- Endpoint: POST https://api.vextorium.com/v1/funding-rates?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-crypto-funding-rates-c27a2da3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HkErIMYxLFYIKOFW7Fj1S

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability vextorium-crypto-funding-rates-c27a2da3 -d '<json body>'
```

Example prompt: What are the current perpetual futures funding rates for ETH across exchanges like dYdX, Hyperliquid, and Aevo — including the annualized rates and any arbitrage spread between them?

## When to prefer this

Choose this endpoint when you need real-time perpetual futures funding rate data across multiple DeFi and CeFi exchanges simultaneously, especially for arbitrage analysis between platforms like dYdX, Hyperliquid, and Aevo. It is particularly useful when you want both raw rate data and an interpreted arbitrage strategy suggestion in a single call. Prefer this over exchange-specific APIs when cross-exchange comparison is the primary goal.

## Known failure modes

- Currency not supported — returns empty or null exchange list
- No open interest data available for a specific exchange — open_interest_usd is null
- Exchange temporarily unavailable — exchange entry may have null price or rates
- Invalid body type or missing required fields — likely 400 error
- Rate data stale or not yet updated — note field may indicate this

## How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

## Output

Returns a JSON object containing the queried currency, a note explaining funding rate direction, a strategy suggestion for cross-exchange arbitrage, an array of exchange-level objects (exchange name, current price, 1h rate %, 8h rate %, annualized rate %, open interest in USD), and the annualized percentage difference between the best and worst rates.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "limit": {
   "type": "integer"
  },
  "currency": {
   "type": "string",
   "description": "BTC, ETH, SOL... (omit to scan spreads)"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "note": "Positive funding: longs pay shorts. Current rates, they change every hour.",
  "currency": "ETH",
  "strategy": "Long on dYdX and short on Hyperliquid collects the funding difference (before fees and risk).",
  "exchanges": [
   {
    "price": 2683.42,
    "exchange": "dYdX",
    "annual_pct": -0.22,
    "rate_1h_pct": -0.000025,
    "rate_8h_pct": -0.0002,
    "open_interest_usd": 12227137
   },
   {
    "price": null,
    "exchange": "Aevo",
    "annual_pct": 3.5,
    "rate_1h_pct": 0.0004,
    "rate_8h_pct": 0.0032,
    "open_interest_usd": null
   }
  ],
  "without_data": null,
  "annual_difference_pct": 11.17
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-crypto-funding-rates-c27a2da3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)